monaro o2 sensor removal

[vxr2010]

I seem to like resurrecting this post , but i think it’s easier to keep it all in one place , so one of the 02 sensors fitted 5 years ago has failed , they both came off easily , i tried cleaning them both carb cleaner and petrol but no effect , so i was not sure which one was at fault as a standard code reader can’t read the faults , it was just coming up on the dash but not saying what , push the usual display button and it goes away , so as above only two sensors that are post cat , the sensors plug is not the four wire square one but four wires in a row , i have the iphone app four stroke plus a wifi obd plug , the voltage of the busted one stayed at .44 to .45 and hardly moved when engine was running , so up to this point i always changed o2 sensors as a pair so i went through the older ones until i found a working one just by plugging it in and lightly screwing it into the exhaust till i found a working one , the working sensors are moving from around 0.05 to .90 , one sensor i had was slower to move so binned they one off , the four stroke display shows both sensors working at the same time , so fingers now crossed , i then found a second display on the dash probably common knowledge but i did not know , ignition off push the mode and select together then ignition on that’s one display then scroll through , second display just press the mode button turn ignition on second display scroll through

[vxr2010]

the 02 sensor part number is 0258005703 , bank 1 sensor 1 is the left side of the exhaust as you look forward from the back of the car , the bank 2 sensor 1 is the right side of the exhaust , worth some wd40 before trying to remove , i have headers which i think has made things easier